/*! peerjs build:0.3.13, development. Copyright(c) 2013 Michelle Bu <michelle@michellebu.com> */(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
  module.exports.RTCSessionDescription = window.RTCSessionDescription ||
  window.mozRTCSessionDescription;
  module.exports.RTCPeerConnection = window.RTCPeerConnection ||
  window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
  module.exports.RTCIceCandidate = window.RTCIceCandidate ||
  window.mozRTCIceCandidate;

},{}],2:[function(require,module,exports){
  var util = require('./util');
  var EventEmitter = require('eventemitter3');
  var Negotiator = require('./negotiator');
  var Reliable = require('reliable');

  /**
   * Wraps a DataChannel between two Peers.
   */
  function DataConnection(peer, provider, options) {
    if (!(this instanceof DataConnection)) return new DataConnection(peer, provider, options);
    EventEmitter.call(this);

    this.options = util.extend({
      serialization: 'binary',
      reliable: false
    }, options);

    // Connection is not open yet.
    this.open = false;
    this.type = 'data';
    this.peer = peer;
    this.provider = provider;

    this.id = this.options.connectionId || DataConnection._idPrefix + util.randomToken();

    this.label = this.options.label || this.id;
    this.metadata = this.options.metadata;
    this.serialization = this.options.serialization;
    this.reliable = this.options.reliable;

    // Data channel buffering.
    this._buffer = [];
    this._buffering = false;
    this.bufferSize = 0;

    // For storing large data.
    this._chunkedData = {};

    if (this.options._payload) {
      this._peerBrowser = this.options._payload.browser;
    }

    Negotiator.startConnection(
        this,
        this.options._payload || {
          originator: true
        }
    );
  }

  util.inherits(DataConnection, EventEmitter);

  DataConnection._idPrefix = 'dc_';

  /** Called by the Negotiator when the DataChannel is ready. */
  DataConnection.prototype.initialize = function(dc) {
    this._dc = this.dataChannel = dc;
    this._configureDataChannel();
  }

  DataConnection.prototype._configureDataChannel = function() {
    var self = this;
    if (util.supports.sctp) {
      this._dc.binaryType = 'arraybuffer';
    }
    this._dc.onopen = function() {
      util.log('Data channel connection success');
      self.open = true;
      self.emit('open');
    }

    // Use the Reliable shim for non Firefox browsers
    if (!util.supports.sctp && this.reliable) {
      this._reliable = new Reliable(this._dc, util.debug);
    }

    if (this._reliable) {
      this._reliable.onmessage = function(msg) {
        self.emit('data', msg);
      };
    } else {
      this._dc.onmessage = function(e) {
        self._handleDataMessage(e);
      };
    }
    this._dc.onclose = function(e) {
      util.log('DataChannel closed for:', self.peer);
      self.close();
    };
  }

// Handles a DataChannel message.
  DataConnection.prototype._handleDataMessage = function(e) {
    var self = this;
    var data = e.data;
    var datatype = data.constructor;
    if (this.serialization === 'binary' || this.serialization === 'binary-utf8') {
      if (datatype === Blob) {
        // Datatype should never be blob
        util.blobToArrayBuffer(data, function(ab) {
          data = util.unpack(ab);
          self.emit('data', data);
        });
        return;
      } else if (datatype === ArrayBuffer) {
        data = util.unpack(data);
      } else if (datatype === String) {
        // String fallback for binary data for browsers that don't support binary yet
        var ab = util.binaryStringToArrayBuffer(data);
        data = util.unpack(ab);
      }
    } else if (this.serialization === 'json') {
      data = JSON.parse(data);
    }

    // Check if we've chunked--if so, piece things back together.
    // We're guaranteed that this isn't 0.
    if (data.__peerData) {
      var id = data.__peerData;
      var chunkInfo = this._chunkedData[id] || {data: [], count: 0, total: data.total};

      chunkInfo.data[data.n] = data.data;
      chunkInfo.count += 1;

      if (chunkInfo.total === chunkInfo.count) {
        // Clean up before making the recursive call to `_handleDataMessage`.
        delete this._chunkedData[id];

        // We've received all the chunks--time to construct the complete data.
        data = new Blob(chunkInfo.data);
        this._handleDataMessage({data: data});
      }

      this._chunkedData[id] = chunkInfo;
      return;
    }

    this.emit('data', data);
  }

  /**
   * Exposed functionality for users.
   */

  /** Allows user to close connection. */
  DataConnection.prototype.close = function() {
    if (!this.open) {
      return;
    }
    this.open = false;
    Negotiator.cleanup(this);
    this.emit('close');
  }

  /** Allows user to send data. */
  DataConnection.prototype.send = function(data, chunked) {
    if (!this.open) {
      this.emit('error', new Error('Connection is not open. You should listen for the `open` event before sending messages.'));
      return;
    }
    if (this._reliable) {
      // Note: reliable shim sending will make it so that you cannot customize
      // serialization.
      this._reliable.send(data);
      return;
    }
    var self = this;
    if (this.serialization === 'json') {
      this._bufferedSend(JSON.stringify(data));
    } else if (this.serialization === 'binary' || this.serialization === 'binary-utf8') {
      var blob = util.pack(data);

      // For Chrome-Firefox interoperability, we need to make Firefox "chunk"
      // the data it sends out.
      var needsChunking = util.chunkedBrowsers[this._peerBrowser] || util.chunkedBrowsers[util.browser];
      if (needsChunking && !chunked && blob.size > util.chunkedMTU) {
        this._sendChunks(blob);
        return;
      }

      // DataChannel currently only supports strings.
      if (!util.supports.sctp) {
        util.blobToBinaryString(blob, function(str) {
          self._bufferedSend(str);
        });
      } else if (!util.supports.binaryBlob) {
        // We only do this if we really need to (e.g. blobs are not supported),
        // because this conversion is costly.
        util.blobToArrayBuffer(blob, function(ab) {
          self._bufferedSend(ab);
        });
      } else {
        this._bufferedSend(blob);
      }
    } else {
      this._bufferedSend(data);
    }
  }

  DataConnection.prototype._bufferedSend = function(msg) {
    if (this._buffering || !this._trySend(msg)) {
      this._buffer.push(msg);
      this.bufferSize = this._buffer.length;
    }
  }

// Returns true if the send succeeds.
  DataConnection.prototype._trySend = function(msg) {
    try {
      this._dc.send(msg);
    } catch (e) {
      this._buffering = true;

      var self = this;
      setTimeout(function() {
        // Try again.
        self._buffering = false;
        self._tryBuffer();
      }, 100);
      return false;
    }
    return true;
  }

// Try to send the first message in the buffer.
  DataConnection.prototype._tryBuffer = function() {
    if (this._buffer.length === 0) {
      return;
    }

    var msg = this._buffer[0];

    if (this._trySend(msg)) {
      this._buffer.shift();
      this.bufferSize = this._buffer.length;
      this._tryBuffer();
    }
  }

  DataConnection.prototype._sendChunks = function(blob) {
    var blobs = util.chunk(blob);
    for (var i = 0, ii = blobs.length; i < ii; i += 1) {
      var blob = blobs[i];
      this.send(blob, true);
    }
  }

  DataConnection.prototype.handleMessage = function(message) {
    var payload = message.payload;

    switch (message.type) {
      case 'ANSWER':
        this._peerBrowser = payload.browser;

        // Forward to negotiator
        Negotiator.handleSDP(message.type, this, payload.sdp);
        break;
      case 'CANDIDATE':
        Negotiator.handleCandidate(this, payload.candidate);
        break;
      default:
        util.warn('Unrecognized message type:', message.type, 'from peer:', this.peer);
        break;
    }
  }

  module.exports = DataConnection;

},{"./negotiator":5,"./util":8,"eventemitter3":9,"reliable":12}],3:[function(require,module,exports){
  window.Socket = require('./socket');
  window.MediaConnection = require('./mediaconnection');
  window.DataConnection = require('./dataconnection');
  window.Peer = require('./peer');
  window.RTCPeerConnection = require('./adapter').RTCPeerConnection;
  window.RTCSessionDescription = require('./adapter').RTCSessionDescription;
  window.RTCIceCandidate = require('./adapter').RTCIceCandidate;
  window.Negotiator = require('./negotiator');
  window.util = require('./util');
  window.BinaryPack = require('js-binarypack');

},{"./adapter":1,"./dataconnection":2,"./mediaconnection":4,"./negotiator":5,"./peer":6,"./socket":7,"./util":8,"js-binarypack":10}],4:[function(require,module,exports){
  var util = require('./util');
  var EventEmitter = require('eventemitter3');
  var Negotiator = require('./negotiator');

  /**
   * Wraps the streaming interface between two Peers.
   */
  function MediaConnection(peer, provider, options) {
    if (!(this instanceof MediaConnection)) return new MediaConnection(peer, provider, options);
    EventEmitter.call(this);

    this.options = util.extend({}, options);

    this.open = false;
    this.type = 'media';
    this.peer = peer;
    this.provider = provider;
    this.metadata = this.options.metadata;
    this.localStream = this.options._stream;

    this.id = this.options.connectionId || MediaConnection._idPrefix + util.randomToken();
    if (this.localStream) {
      Negotiator.startConnection(
          this,
          {_stream: this.localStream, originator: true}
      );
    }
  };

  util.inherits(MediaConnection, EventEmitter);

  MediaConnection._idPrefix = 'mc_';

  MediaConnection.prototype.addStream = function(remoteStream) {
    util.log('Receiving stream', remoteStream);

    this.remoteStream = remoteStream;
    this.emit('stream', remoteStream); // Should we call this `open`?

  };

  MediaConnection.prototype.handleMessage = function(message) {
    var payload = message.payload;

    switch (message.type) {
      case 'ANSWER':
        // Forward to negotiator
        Negotiator.handleSDP(message.type, this, payload.sdp);
        this.open = true;
        break;
      case 'CANDIDATE':
        Negotiator.handleCandidate(this, payload.candidate);
        break;
      default:
        util.warn('Unrecognized message type:', message.type, 'from peer:', this.peer);
        break;
    }
  }

  MediaConnection.prototype.answer = function(stream) {
    if (this.localStream) {
      util.warn('Local stream already exists on this MediaConnection. Are you answering a call twice?');
      return;
    }

    this.options._payload._stream = stream;

    this.localStream = stream;
    Negotiator.startConnection(
        this,
        this.options._payload
    )
    // Retrieve lost messages stored because PeerConnection not set up.
    var messages = this.provider._getMessages(this.id);
    for (var i = 0, ii = messages.length; i < ii; i += 1) {
      this.handleMessage(messages[i]);
    }
    this.open = true;
  };

  /**
   * Exposed functionality for users.
   */

  /** Allows user to close connection. */
  MediaConnection.prototype.close = function() {
    if (!this.open) {
      return;
    }
    this.open = false;
    Negotiator.cleanup(this);
    this.emit('close')
  };

  module.exports = MediaConnection;

},{"./negotiator":5,"./util":8,"eventemitter3":9}],5:[function(require,module,exports){
  var util = require('./util');
  var RTCPeerConnection = require('./adapter').RTCPeerConnection;
  var RTCSessionDescription = require('./adapter').RTCSessionDescription;
  var RTCIceCandidate = require('./adapter').RTCIceCandidate;

  /**
   * Manages all negotiations between Peers.
   */
  var Negotiator = {
    pcs: {
      data: {},
      media: {}
    }, // type => {peerId: {pc_id: pc}}.
    //providers: {}, // provider's id => providers (there may be multiple providers/client.
    queue: [] // connections that are delayed due to a PC being in use.
  }

  Negotiator._idPrefix = 'pc_';

  /** Returns a PeerConnection object set up correctly (for data, media). */
  Negotiator.startConnection = function(connection, options) {
    var pc = Negotiator._getPeerConnection(connection, options);

    if (connection.type === 'media' && options._stream) {
      // Add the stream.
      pc.addStream(options._stream);
    }

    // Set the connection's PC.
    connection.pc = connection.peerConnection = pc;
    // What do we need to do now?
    if (options.originator) {
      if (connection.type === 'data') {
        // Create the datachannel.
        var config = {};
        // Dropping reliable:false support, since it seems to be crashing
        // Chrome.
        /*if (util.supports.sctp && !options.reliable) {
         // If we have canonical reliable support...
         config = {maxRetransmits: 0};
         }*/
        // Fallback to ensure older browsers don't crash.
        if (!util.supports.sctp) {
          config = {reliable: options.reliable};
        }
        var dc = pc.createDataChannel(connection.label, config);
        connection.initialize(dc);
      }

      if (!util.supports.onnegotiationneeded) {
        Negotiator._makeOffer(connection);
      }
    } else {
      Negotiator.handleSDP('OFFER', connection, options.sdp);
    }
  }

  Negotiator._getPeerConnection = function(connection, options) {
    if (!Negotiator.pcs[connection.type]) {
      util.error(connection.type + ' is not a valid connection type. Maybe you overrode the `type` property somewhere.');
    }

    if (!Negotiator.pcs[connection.type][connection.peer]) {
      Negotiator.pcs[connection.type][connection.peer] = {};
    }
    var peerConnections = Negotiator.pcs[connection.type][connection.peer];

    var pc;
    // Not multiplexing while FF and Chrome have not-great support for it.
    /*if (options.multiplex) {
     ids = Object.keys(peerConnections);
     for (var i = 0, ii = ids.length; i < ii; i += 1) {
     pc = peerConnections[ids[i]];
     if (pc.signalingState === 'stable') {
     break; // We can go ahead and use this PC.
     }
     }
     } else */
    if (options.pc) { // Simplest case: PC id already provided for us.
      pc = Negotiator.pcs[connection.type][connection.peer][options.pc];
    }

    if (!pc || pc.signalingState !== 'stable') {
      pc = Negotiator._startPeerConnection(connection);
    }
    return pc;
  }

  /*
   Negotiator._addProvider = function(provider) {
   if ((!provider.id && !provider.disconnected) || !provider.socket.open) {
   // Wait for provider to obtain an ID.
   provider.on('open', function(id) {
   Negotiator._addProvider(provider);
   });
   } else {
   Negotiator.providers[provider.id] = provider;
   }
   }*/


  /** Start a PC. */
  Negotiator._startPeerConnection = function(connection) {
    util.log('Creating RTCPeerConnection.');

    var id = Negotiator._idPrefix + util.randomToken();
    var optional = {};

    if (connection.type === 'data' && !util.supports.sctp) {
      optional = {optional: [{RtpDataChannels: true}]};
    } else if (connection.type === 'media') {
      // Interop req for chrome.
      optional = {optional: [{DtlsSrtpKeyAgreement: true}]};
    }

    var pc = new RTCPeerConnection(connection.provider.options.config, optional);
    Negotiator.pcs[connection.type][connection.peer][id] = pc;

    Negotiator._setupListeners(connection, pc, id);

    return pc;
  }

  /** Set up various WebRTC listeners. */
  Negotiator._setupListeners = function(connection, pc, pc_id) {
    var peerId = connection.peer;
    var connectionId = connection.id;
    var provider = connection.provider;

    // ICE CANDIDATES.
    util.log('Listening for ICE candidates.');
    pc.onicecandidate = function(evt) {
      if (evt.candidate) {
        util.log('Received ICE candidates for:', connection.peer);
        provider.socket.send({
          type: 'CANDIDATE',
          payload: {
            candidate: evt.candidate,
            type: connection.type,
            connectionId: connection.id
          },
          dst: peerId
        });
      }
    };

    pc.oniceconnectionstatechange = function() {
      switch (pc.iceConnectionState) {
        case 'disconnected':
        case 'failed':
          util.log('iceConnectionState is disconnected, closing connections to ' + peerId);
          connection.close();
          break;
        case 'completed':
          pc.onicecandidate = util.noop;
          break;
      }
    };

    // Fallback for older Chrome impls.
    pc.onicechange = pc.oniceconnectionstatechange;

    // ONNEGOTIATIONNEEDED (Chrome)
    util.log('Listening for `negotiationneeded`');
    pc.onnegotiationneeded = function() {
      util.log('`negotiationneeded` triggered');
      if (pc.signalingState == 'stable') {
        Negotiator._makeOffer(connection);
      } else {
        util.log('onnegotiationneeded triggered when not stable. Is another connection being established?');
      }
    };

    // DATACONNECTION.
    util.log('Listening for data channel');
    // Fired between offer and answer, so options should already be saved
    // in the options hash.
    pc.ondatachannel = function(evt) {
      util.log('Received data channel');
      var dc = evt.channel;
      var connection = provider.getConnection(peerId, connectionId);
      connection.initialize(dc);
    };

    // MEDIACONNECTION.
    util.log('Listening for remote stream');
    pc.onaddstream = function(evt) {
      util.log('Received remote stream');
      var stream = evt.stream;
      var connection = provider.getConnection(peerId, connectionId);
      // 10/10/2014: looks like in Chrome 38, onaddstream is triggered after
      // setting the remote description. Our connection object in these cases
      // is actually a DATA connection, so addStream fails.
      // TODO: This is hopefully just a temporary fix. We should try to
      // understand why this is happening.
      if (connection.type === 'media') {
        connection.addStream(stream);
      }
    };
  }

  Negotiator.cleanup = function(connection) {
    util.log('Cleaning up PeerConnection to ' + connection.peer);

    var pc = connection.pc;

    if (!!pc && (pc.readyState !== 'closed' || pc.signalingState !== 'closed')) {
      pc.close();
      connection.pc = null;
    }
  }

  Negotiator._makeOffer = function(connection) {
    var pc = connection.pc;
    pc.createOffer(function(offer) {
      util.log('Created offer.');

      if (!util.supports.sctp && connection.type === 'data' && connection.reliable) {
        offer.sdp = Reliable.higherBandwidthSDP(offer.sdp);
      }

      pc.setLocalDescription(offer, function() {
        util.log('Set localDescription: offer', 'for:', connection.peer);
        connection.provider.socket.send({
          type: 'OFFER',
          payload: {
            sdp: offer,
            type: connection.type,
            label: connection.label,
            connectionId: connection.id,
            reliable: connection.reliable,
            serialization: connection.serialization,
            metadata: connection.metadata,
            browser: util.browser
          },
          dst: connection.peer
        });
      }, function(err) {
        connection.provider.emitError('webrtc', err);
        util.log('Failed to setLocalDescription, ', err);
      });
    }, function(err) {
      connection.provider.emitError('webrtc', err);
      util.log('Failed to createOffer, ', err);
    }, connection.options.constraints);
  }

  Negotiator._makeAnswer = function(connection) {
    var pc = connection.pc;

    pc.createAnswer(function(answer) {
      util.log('Created answer.');

      if (!util.supports.sctp && connection.type === 'data' && connection.reliable) {
        answer.sdp = Reliable.higherBandwidthSDP(answer.sdp);
      }

      pc.setLocalDescription(answer, function() {
        util.log('Set localDescription: answer', 'for:', connection.peer);
        connection.provider.socket.send({
          type: 'ANSWER',
          payload: {
            sdp: answer,
            type: connection.type,
            connectionId: connection.id,
            browser: util.browser
          },
          dst: connection.peer
        });
      }, function(err) {
        connection.provider.emitError('webrtc', err);
        util.log('Failed to setLocalDescription, ', err);
      });
    }, function(err) {
      connection.provider.emitError('webrtc', err);
      util.log('Failed to create answer, ', err);
    });
  }

  /** Handle an SDP. */
  Negotiator.handleSDP = function(type, connection, sdp) {
    sdp = new RTCSessionDescription(sdp);
    var pc = connection.pc;

    util.log('Setting remote description', sdp);
    pc.setRemoteDescription(sdp, function() {
      util.log('Set remoteDescription:', type, 'for:', connection.peer);

      if (type === 'OFFER') {
        Negotiator._makeAnswer(connection);
      }
    }, function(err) {
      connection.provider.emitError('webrtc', err);
      util.log('Failed to setRemoteDescription, ', err);
    });
  }

  /** Handle a candidate. */
  Negotiator.handleCandidate = function(connection, ice) {
    var candidate = ice.candidate;
    var sdpMLineIndex = ice.sdpMLineIndex;
    connection.pc.addIceCandidate(new RTCIceCandidate({
      sdpMLineIndex: sdpMLineIndex,
      candidate: candidate
    }));
    util.log('Added ICE candidate for:', connection.peer);
  }

  module.exports = Negotiator;

},{"./adapter":1,"./util":8}],6:[function(require,module,exports){
  var util = require('./util');
  var EventEmitter = require('eventemitter3');
  var Socket = require('./socket');
  var MediaConnection = require('./mediaconnection');
  var DataConnection = require('./dataconnection');

  /**
   * A peer who can initiate connections with other peers.
   */
  function Peer(id, options) {
    if (!(this instanceof Peer)) return new Peer(id, options);
    EventEmitter.call(this);

    // Deal with overloading
    if (id && id.constructor == Object) {
      options = id;
      id = undefined;
    } else if (id) {
      // Ensure id is a string
      id = id.toString();
    }
    //

    // Configurize options
    options = util.extend({
      debug: 0, // 1: Errors, 2: Warnings, 3: All chat
      host: util.CLOUD_HOST,
      port: util.CLOUD_PORT,
      key: 'peerjs',
      path: '/',
      token: util.randomToken(),
      config: util.defaultConfig
    }, options);
    this.options = options;
    // Detect relative URL host.
    if (options.host === '/') {
      options.host = window.location.hostname;
    }
    // Set path correctly.
    if (options.path[0] !== '/') {
      options.path = '/' + options.path;
    }
    if (options.path[options.path.length - 1] !== '/') {
      options.path += '/';
    }

    // Set whether we use SSL to same as current host
    if (options.secure === undefined && options.host !== util.CLOUD_HOST) {
      options.secure = util.isSecure();
    }
    // Set a custom log function if present
    if (options.logFunction) {
      util.setLogFunction(options.logFunction);
    }
    util.setLogLevel(options.debug);
    //

    // Sanity checks
    // Ensure WebRTC supported
    if (!util.supports.audioVideo && !util.supports.data ) {
      this._delayedAbort('browser-incompatible', 'The current browser does not support WebRTC');
      return;
    }
    // Ensure alphanumeric id
    if (!util.validateId(id)) {
      this._delayedAbort('invalid-id', 'ID "' + id + '" is invalid');
      return;
    }
    // Ensure valid key
    if (!util.validateKey(options.key)) {
      this._delayedAbort('invalid-key', 'API KEY "' + options.key + '" is invalid');
      return;
    }
    // Ensure not using unsecure cloud server on SSL page
    if (options.secure && options.host === '0.peerjs.com') {
      this._delayedAbort('ssl-unavailable',
          'The cloud server currently does not support HTTPS. Please run your own PeerServer to use HTTPS.');
      return;
    }
    //

    // States.
    this.destroyed = false; // Connections have been killed
    this.disconnected = false; // Connection to PeerServer killed but P2P connections still active
    this.open = false; // Sockets and such are not yet open.
    //

    // References
    this.connections = {}; // DataConnections for this peer.
    this._lostMessages = {}; // src => [list of messages]
    //

    // Start the server connection
    this._initializeServerConnection();
    if (id) {
      this._initialize(id);
    } else {
      this._retrieveId();
    }
    //
  }

  util.inherits(Peer, EventEmitter);

// Initialize the 'socket' (which is actually a mix of XHR streaming and
// websockets.)
  Peer.prototype._initializeServerConnection = function() {
    var self = this;
    this.socket = new Socket(this.options.secure, this.options.host, this.options.port, this.options.path, this.options.key);
    this.socket.on('message', function(data) {
      self._handleMessage(data);
    });
    this.socket.on('error', function(error) {
      self._abort('socket-error', error);
    });
    this.socket.on('disconnected', function() {
      // If we haven't explicitly disconnected, emit error and disconnect.
      if (!self.disconnected) {
        self.emitError('network', 'Lost connection to server.');
        self.disconnect();
      }
    });
    this.socket.on('close', function() {
      // If we haven't explicitly disconnected, emit error.
      if (!self.disconnected) {
        self._abort('socket-closed', 'Underlying socket is already closed.');
      }
    });
  };

  /** Get a unique ID from the server via XHR. */
  Peer.prototype._retrieveId = function(cb) {
    var self = this;
    var http = new XMLHttpRequest();
    var protocol = this.options.secure ? 'https://' : 'http://';
    var url = protocol + this.options.host + ':' + this.options.port +
        this.options.path + this.options.key + '/id';
    var queryString = '?ts=' + new Date().getTime() + '' + Math.random();
    url += queryString;

    // If there's no ID we need to wait for one before trying to init socket.
    http.open('get', url, true);
    http.onerror = function(e) {
      util.error('Error retrieving ID', e);
      var pathError = '';
      if (self.options.path === '/' && self.options.host !== util.CLOUD_HOST) {
        pathError = ' If you passed in a `path` to your self-hosted PeerServer, ' +
        'you\'ll also need to pass in that same path when creating a new ' +
        'Peer.';
      }
      self._abort('server-error', 'Could not get an ID from the server.' + pathError);
    };
    http.onreadystatechange = function() {
      if (http.readyState !== 4) {
        return;
      }
      if (http.status !== 200) {
        http.onerror();
        return;
      }
      self._initialize(http.responseText);
    };
    http.send(null);
  };

  /** Initialize a connection with the server. */
  Peer.prototype._initialize = function(id) {
    this.id = id;
    this.socket.start(this.id, this.options.token);
  };

  /** Handles messages from the server. */
  Peer.prototype._handleMessage = function(message) {
    var type = message.type;
    var payload = message.payload;
    var peer = message.src;
    var connection;

    switch (type) {
      case 'OPEN': // The connection to the server is open.
        this.emit('open', this.id);
        this.open = true;
        break;
      case 'ERROR': // Server error.
        this._abort('server-error', payload.msg);
        break;
      case 'ID-TAKEN': // The selected ID is taken.
        this._abort('unavailable-id', 'ID `' + this.id + '` is taken');
        break;
      case 'INVALID-KEY': // The given API key cannot be found.
        this._abort('invalid-key', 'API KEY "' + this.options.key + '" is invalid');
        break;

      //
      case 'LEAVE': // Another peer has closed its connection to this peer.
        util.log('Received leave message from', peer);
        this._cleanupPeer(peer);
        break;

      case 'EXPIRE': // The offer sent to a peer has expired without response.
        this.emitError('peer-unavailable', 'Could not connect to peer ' + peer);
        break;
      case 'OFFER': // we should consider switching this to CALL/CONNECT, but this is the least breaking option.
        var connectionId = payload.connectionId;
        connection = this.getConnection(peer, connectionId);

        if (connection) {
          util.warn('Offer received for existing Connection ID:', connectionId);
          //connection.handleMessage(message);
        } else {
          // Create a new connection.
          if (payload.type === 'media') {
            connection = new MediaConnection(peer, this, {
              connectionId: connectionId,
              _payload: payload,
              metadata: payload.metadata
            });
            this._addConnection(peer, connection);
            this.emit('call', connection);
          } else if (payload.type === 'data') {
            connection = new DataConnection(peer, this, {
              connectionId: connectionId,
              _payload: payload,
              metadata: payload.metadata,
              label: payload.label,
              serialization: payload.serialization,
              reliable: payload.reliable
            });
            this._addConnection(peer, connection);
            this.emit('connection', connection);
          } else {
            util.warn('Received malformed connection type:', payload.type);
            return;
          }
          // Find messages.
          var messages = this._getMessages(connectionId);
          for (var i = 0, ii = messages.length; i < ii; i += 1) {
            connection.handleMessage(messages[i]);
          }
        }
        break;
      default:
        if (!payload) {
          util.warn('You received a malformed message from ' + peer + ' of type ' + type);
          return;
        }

        var id = payload.connectionId;
        connection = this.getConnection(peer, id);

        if (connection && connection.pc) {
          // Pass it on.
          connection.handleMessage(message);
        } else if (id) {
          // Store for possible later use
          this._storeMessage(id, message);
        } else {
          util.warn('You received an unrecognized message:', message);
        }
        break;
    }
  };

  /** Stores messages without a set up connection, to be claimed later. */
  Peer.prototype._storeMessage = function(connectionId, message) {
    if (!this._lostMessages[connectionId]) {
      this._lostMessages[connectionId] = [];
    }
    this._lostMessages[connectionId].push(message);
  };

  /** Retrieve messages from lost message store */
  Peer.prototype._getMessages = function(connectionId) {
    var messages = this._lostMessages[connectionId];
    if (messages) {
      delete this._lostMessages[connectionId];
      return messages;
    } else {
      return [];
    }
  };

  /**
   * Returns a DataConnection to the specified peer. See documentation for a
   * complete list of options.
   */
  Peer.prototype.connect = function(peer, options) {
    if (this.disconnected) {
      util.warn('You cannot connect to a new Peer because you called ' +
      '.disconnect() on this Peer and ended your connection with the ' +
      'server. You can create a new Peer to reconnect, or call reconnect ' +
      'on this peer if you believe its ID to still be available.');
      this.emitError('disconnected', 'Cannot connect to new Peer after disconnecting from server.');
      return;
    }
    var connection = new DataConnection(peer, this, options);
    this._addConnection(peer, connection);
    return connection;
  };

  /**
   * Returns a MediaConnection to the specified peer. See documentation for a
   * complete list of options.
   */
  Peer.prototype.call = function(peer, stream, options) {
    if (this.disconnected) {
      util.warn('You cannot connect to a new Peer because you called ' +
      '.disconnect() on this Peer and ended your connection with the ' +
      'server. You can create a new Peer to reconnect.');
      this.emitError('disconnected', 'Cannot connect to new Peer after disconnecting from server.');
      return;
    }
    if (!stream) {
      util.error('To call a peer, you must provide a stream from your browser\'s `getUserMedia`.');
      return;
    }
    options = options || {};
    options._stream = stream;
    var call = new MediaConnection(peer, this, options);
    this._addConnection(peer, call);
    return call;
  };

  /** Add a data/media connection to this peer. */
  Peer.prototype._addConnection = function(peer, connection) {
    if (!this.connections[peer]) {
      this.connections[peer] = [];
    }
    this.connections[peer].push(connection);
  };

  /** Retrieve a data/media connection for this peer. */
  Peer.prototype.getConnection = function(peer, id) {
    var connections = this.connections[peer];
    if (!connections) {
      return null;
    }
    for (var i = 0, ii = connections.length; i < ii; i++) {
      if (connections[i].id === id) {
        return connections[i];
      }
    }
    return null;
  };

  Peer.prototype._delayedAbort = function(type, message) {
    var self = this;
    util.setZeroTimeout(function(){
      self._abort(type, message);
    });
  };

  /**
   * Destroys the Peer and emits an error message.
   * The Peer is not destroyed if it's in a disconnected state, in which case
   * it retains its disconnected state and its existing connections.
   */
  Peer.prototype._abort = function(type, message) {
    util.error('Aborting!');
    if (!this._lastServerId) {
      this.destroy();
    } else {
      this.disconnect();
    }
    this.emitError(type, message);
  };

  /** Emits a typed error message. */
  Peer.prototype.emitError = function(type, err) {
    util.error('Error:', err);
    if (typeof err === 'string') {
      err = new Error(err);
    }
    err.type = type;
    this.emit('error', err);
  };

  /**
   * Destroys the Peer: closes all active connections as well as the connection
   *  to the server.
   * Warning: The peer can no longer create or accept connections after being
   *  destroyed.
   */
  Peer.prototype.destroy = function() {
    if (!this.destroyed) {
      this._cleanup();
      this.disconnect();
      this.destroyed = true;
    }
  };


  /** Disconnects every connection on this peer. */
  Peer.prototype._cleanup = function() {
    if (this.connections) {
      var peers = Object.keys(this.connections);
      for (var i = 0, ii = peers.length; i < ii; i++) {
        this._cleanupPeer(peers[i]);
      }
    }
    this.emit('close');
  };

  /** Closes all connections to this peer. */
  Peer.prototype._cleanupPeer = function(peer) {
    var connections = this.connections[peer];
    for (var j = 0, jj = connections.length; j < jj; j += 1) {
      connections[j].close();
    }
  };

  /**
   * Disconnects the Peer's connection to the PeerServer. Does not close any
   *  active connections.
   * Warning: The peer can no longer create or accept connections after being
   *  disconnected. It also cannot reconnect to the server.
   */
  Peer.prototype.disconnect = function() {
    var self = this;
    util.setZeroTimeout(function(){
      if (!self.disconnected) {
        self.disconnected = true;
        self.open = false;
        if (self.socket) {
          self.socket.close();
        }
        self.emit('disconnected', self.id);
        self._lastServerId = self.id;
        self.id = null;
      }
    });
  };

  /** Attempts to reconnect with the same ID. */
  Peer.prototype.reconnect = function() {
    if (this.disconnected && !this.destroyed) {
      util.log('Attempting reconnection to server with ID ' + this._lastServerId);
      this.disconnected = false;
      this._initializeServerConnection();
      this._initialize(this._lastServerId);
    } else if (this.destroyed) {
      throw new Error('This peer cannot reconnect to the server. It has already been destroyed.');
    } else if (!this.disconnected && !this.open) {
      // Do nothing. We're still connecting the first time.
      util.error('In a hurry? We\'re still trying to make the initial connection!');
    } else {
      throw new Error('Peer ' + this.id + ' cannot reconnect because it is not disconnected from the server!');
    }
  };

  /**
   * Get a list of available peer IDs. If you're running your own server, you'll
   * want to set allow_discovery: true in the PeerServer options. If you're using
   * the cloud server, email team@peerjs.com to get the functionality enabled for
   * your key.
   */
  Peer.prototype.listAllPeers = function(cb) {
    cb = cb || function() {};
    var self = this;
    var http = new XMLHttpRequest();
    var protocol = this.options.secure ? 'https://' : 'http://';
    var url = protocol + this.options.host + ':' + this.options.port +
        this.options.path + this.options.key + '/peers';
    var queryString = '?ts=' + new Date().getTime() + '' + Math.random();
    url += queryString;

    // If there's no ID we need to wait for one before trying to init socket.
    http.open('get', url, true);
    http.onerror = function(e) {
      self._abort('server-error', 'Could not get peers from the server.');
      cb([]);
    };
    http.onreadystatechange = function() {
      if (http.readyState !== 4) {
        return;
      }
      if (http.status === 401) {
        var helpfulError = '';
        if (self.options.host !== util.CLOUD_HOST) {
          helpfulError = 'It looks like you\'re using the cloud server. You can email ' +
          'team@peerjs.com to enable peer listing for your API key.';
        } else {
          helpfulError = 'You need to enable `allow_discovery` on your self-hosted ' +
          'PeerServer to use this feature.';
        }
        cb([]);
        throw new Error('It doesn\'t look like you have permission to list peers IDs. ' + helpfulError);
      } else if (http.status !== 200) {
        cb([]);
      } else {
        cb(JSON.parse(http.responseText));
      }
    };
    http.send(null);
  };

  module.exports = Peer;

},{"./dataconnection":2,"./mediaconnection":4,"./socket":7,"./util":8,"eventemitter3":9}],7:[function(require,module,exports){
  var util = require('./util');
  var EventEmitter = require('eventemitter3');

  /**
   * An abstraction on top of WebSockets and XHR streaming to provide fastest
   * possible connection for peers.
   */
  function Socket(secure, host, port, path, key) {
    if (!(this instanceof Socket)) return new Socket(secure, host, port, path, key);

    EventEmitter.call(this);

    // Disconnected manually.
    this.disconnected = false;
    this._queue = [];

    var httpProtocol = secure ? 'https://' : 'http://';
    var wsProtocol = secure ? 'wss://' : 'ws://';
    this._httpUrl = httpProtocol + host + ':' + port + path + key;
    this._wsUrl = wsProtocol + host + ':' + port + path + 'peerjs?key=' + key;
  }

  util.inherits(Socket, EventEmitter);


  /** Check in with ID or get one from server. */
  Socket.prototype.start = function(id, token) {
    this.id = id;

    this._httpUrl += '/' + id + '/' + token;
    this._wsUrl += '&id=' + id + '&token=' + token;

    this._startXhrStream();
    this._startWebSocket();
  }


  /** Start up websocket communications. */
  Socket.prototype._startWebSocket = function(id) {
    var self = this;

    if (this._socket) {
      return;
    }

    this._socket = new WebSocket(this._wsUrl);

    this._socket.onmessage = function(event) {
      try {
        var data = JSON.parse(event.data);
      } catch(e) {
        util.log('Invalid server message', event.data);
        return;
      }
      self.emit('message', data);
    };

    this._socket.onclose = function(event) {
      util.log('Socket closed.');
      self.disconnected = true;
      self.emit('disconnected');
    };

    // Take care of the queue of connections if necessary and make sure Peer knows
    // socket is open.
    this._socket.onopen = function() {
      if (self._timeout) {
        clearTimeout(self._timeout);
        setTimeout(function(){
          self._http.abort();
          self._http = null;
        }, 5000);
      }
      self._sendQueuedMessages();
      util.log('Socket open');
    };
  }

  /** Start XHR streaming. */
  Socket.prototype._startXhrStream = function(n) {
    try {
      var self = this;
      this._http = new XMLHttpRequest();
      this._http._index = 1;
      this._http._streamIndex = n || 0;
      this._http.open('post', this._httpUrl + '/id?i=' + this._http._streamIndex, true);
      this._http.onerror = function() {
        // If we get an error, likely something went wrong.
        // Stop streaming.
        clearTimeout(self._timeout);
        self.emit('disconnected');
      }
      this._http.onreadystatechange = function() {
        if (this.readyState == 2 && this.old) {
          this.old.abort();
          delete this.old;
        } else if (this.readyState > 2 && this.status === 200 && this.responseText) {
          self._handleStream(this);
        }
      };
      this._http.send(null);
      this._setHTTPTimeout();
    } catch(e) {
      util.log('XMLHttpRequest not available; defaulting to WebSockets');
    }
  }


  /** Handles onreadystatechange response as a stream. */
  Socket.prototype._handleStream = function(http) {
    // 3 and 4 are loading/done state. All others are not relevant.
    var messages = http.responseText.split('\n');

    // Check to see if anything needs to be processed on buffer.
    if (http._buffer) {
      while (http._buffer.length > 0) {
        var index = http._buffer.shift();
        var bufferedMessage = messages[index];
        try {
          bufferedMessage = JSON.parse(bufferedMessage);
        } catch(e) {
          http._buffer.shift(index);
          break;
        }
        this.emit('message', bufferedMessage);
      }
    }

    var message = messages[http._index];
    if (message) {
      http._index += 1;
      // Buffering--this message is incomplete and we'll get to it next time.
      // This checks if the httpResponse ended in a `\n`, in which case the last
      // element of messages should be the empty string.
      if (http._index === messages.length) {
        if (!http._buffer) {
          http._buffer = [];
        }
        http._buffer.push(http._index - 1);
      } else {
        try {
          message = JSON.parse(message);
        } catch(e) {
          util.log('Invalid server message', message);
          return;
        }
        this.emit('message', message);
      }
    }
  }

  Socket.prototype._setHTTPTimeout = function() {
    var self = this;
    this._timeout = setTimeout(function() {
      var old = self._http;
      if (!self._wsOpen()) {
        self._startXhrStream(old._streamIndex + 1);
        self._http.old = old;
      } else {
        old.abort();
      }
    }, 25000);
  }

  /** Is the websocket currently open? */
  Socket.prototype._wsOpen = function() {
    return this._socket && this._socket.readyState == 1;
  }

  /** Send queued messages. */
  Socket.prototype._sendQueuedMessages = function() {
    for (var i = 0, ii = this._queue.length; i < ii; i += 1) {
      this.send(this._queue[i]);
    }
  }

  /** Exposed send for DC & Peer. */
  Socket.prototype.send = function(data) {
    if (this.disconnected) {
      return;
    }

    // If we didn't get an ID yet, we can't yet send anything so we should queue
    // up these messages.
    if (!this.id) {
      this._queue.push(data);
      return;
    }

    if (!data.type) {
      this.emit('error', 'Invalid message');
      return;
    }

    var message = JSON.stringify(data);
    if (this._wsOpen()) {
      this._socket.send(message);
    } else {
      var http = new XMLHttpRequest();
      var url = this._httpUrl + '/' + data.type.toLowerCase();
      http.open('post', url, true);
      http.setRequestHeader('Content-Type', 'application/json');
      http.send(message);
    }
  }

  Socket.prototype.close = function() {
    if (!this.disconnected && this._wsOpen()) {
      this._socket.close();
      this.disconnected = true;
    }
  }

  module.exports = Socket;

},{"./util":8,"eventemitter3":9}],8:[function(require,module,exports){
  var defaultConfig = {'iceServers': [{ 'url': 'stun:stun.l.google.com:19302' }]};
  var dataCount = 1;

  var BinaryPack = require('js-binarypack');
  var RTCPeerConnection = require('./adapter').RTCPeerConnection;

  var util = {
    noop: function() {},

    CLOUD_HOST: '0.peerjs.com',
    CLOUD_PORT: 9000,

    // Browsers that need chunking:
    chunkedBrowsers: {'Chrome': 1},
    chunkedMTU: 16300, // The original 60000 bytes setting does not work when sending data from Firefox to Chrome, which is "cut off" after 16384 bytes and delivered individually.

    // Logging logic
    logLevel: 0,
    setLogLevel: function(level) {
      var debugLevel = parseInt(level, 10);
      if (!isNaN(parseInt(level, 10))) {
        util.logLevel = debugLevel;
      } else {
        // If they are using truthy/falsy values for debug
        util.logLevel = level ? 3 : 0;
      }
      util.log = util.warn = util.error = util.noop;
      if (util.logLevel > 0) {
        util.error = util._printWith('ERROR');
      }
      if (util.logLevel > 1) {
        util.warn = util._printWith('WARNING');
      }
      if (util.logLevel > 2) {
        util.log = util._print;
      }
    },
    setLogFunction: function(fn) {
      if (fn.constructor !== Function) {
        util.warn('The log function you passed in is not a function. Defaulting to regular chat.');
      } else {
        util._print = fn;
      }
    },

    _printWith: function(prefix) {
      return function() {
        var copy = Array.prototype.slice.call(arguments);
        copy.unshift(prefix);
        util._print.apply(util, copy);
      };
    },
    _print: function () {
      var err = false;
      var copy = Array.prototype.slice.call(arguments);
      copy.unshift('PeerJS: ');
      for (var i = 0, l = copy.length; i < l; i++){
        if (copy[i] instanceof Error) {
          copy[i] = '(' + copy[i].name + ') ' + copy[i].message;
          err = true;
        }
      }
      err ? console.error.apply(console, copy) : console.log.apply(console, copy);
    },
    //

    // Returns browser-agnostic default config
    defaultConfig: defaultConfig,
    //

    // Returns the current browser.
    browser: (function() {
      if (window.mozRTCPeerConnection) {
        return 'Firefox';
      } else if (window.webkitRTCPeerConnection) {
        return 'Chrome';
      } else if (window.RTCPeerConnection) {
        return 'Supported';
      } else {
        return 'Unsupported';
      }
    })(),
    //

    // Lists which features are supported
    supports: (function() {
      if (typeof RTCPeerConnection === 'undefined') {
        return {};
      }

      var data = true;
      var audioVideo = true;

      var binaryBlob = false;
      var sctp = false;
      var onnegotiationneeded = !!window.webkitRTCPeerConnection;

      var pc, dc;
      try {
        pc = new RTCPeerConnection(defaultConfig, {optional: [{RtpDataChannels: true}]});
      } catch (e) {
        data = false;
        audioVideo = false;
      }

      if (data) {
        try {
          dc = pc.createDataChannel('_PEERJSTEST');
        } catch (e) {
          data = false;
        }
      }

      if (data) {
        // Binary test
        try {
          dc.binaryType = 'blob';
          binaryBlob = true;
        } catch (e) {
        }

        // Reliable test.
        // Unfortunately Chrome is a bit unreliable about whether or not they
        // support reliable.
        var reliablePC = new RTCPeerConnection(defaultConfig, {});
        try {
          var reliableDC = reliablePC.createDataChannel('_PEERJSRELIABLETEST', {});
          sctp = reliableDC.reliable;
        } catch (e) {
        }
        reliablePC.close();
      }

      // FIXME: not really the best check...
      if (audioVideo) {
        audioVideo = !!pc.addStream;
      }

      // FIXME: this is not great because in theory it doesn't work for
      // av-only browsers (?).
      if (!onnegotiationneeded && data) {
        // sync default check.
        var negotiationPC = new RTCPeerConnection(defaultConfig, {optional: [{RtpDataChannels: true}]});
        negotiationPC.onnegotiationneeded = function() {
          onnegotiationneeded = true;
          // async check.
          if (util && util.supports) {
            util.supports.onnegotiationneeded = true;
          }
        };
        negotiationPC.createDataChannel('_PEERJSNEGOTIATIONTEST');

        setTimeout(function() {
          negotiationPC.close();
        }, 1000);
      }

      if (pc) {
        pc.close();
      }

      return {
        audioVideo: audioVideo,
        data: data,
        binaryBlob: binaryBlob,
        binary: sctp, // deprecated; sctp implies binary support.
        reliable: sctp, // deprecated; sctp implies reliable data.
        sctp: sctp,
        onnegotiationneeded: onnegotiationneeded
      };
    }()),
    //

    // Ensure alphanumeric ids
    validateId: function(id) {
      // Allow empty ids
      return !id || /^[A-Za-z0-9]+(?:[ _-][A-Za-z0-9]+)*$/.exec(id);
    },

    validateKey: function(key) {
      // Allow empty keys
      return !key || /^[A-Za-z0-9]+(?:[ _-][A-Za-z0-9]+)*$/.exec(key);
    },


    debug: false,

    inherits: function(ctor, superCtor) {
      ctor.super_ = superCtor;
      ctor.prototype = Object.create(superCtor.prototype, {
        constructor: {
          value: ctor,
          enumerable: false,
          writable: true,
          configurable: true
        }
      });
    },
    extend: function(dest, source) {
      for(var key in source) {
        if(source.hasOwnProperty(key)) {
          dest[key] = source[key];
        }
      }
      return dest;
    },
    pack: BinaryPack.pack,
    unpack: BinaryPack.unpack,

    log: function () {
      if (util.debug) {
        var err = false;
        var copy = Array.prototype.slice.call(arguments);
        copy.unshift('PeerJS: ');
        for (var i = 0, l = copy.length; i < l; i++){
          if (copy[i] instanceof Error) {
            copy[i] = '(' + copy[i].name + ') ' + copy[i].message;
            err = true;
          }
        }
        err ? console.error.apply(console, copy) : console.log.apply(console, copy);
      }
    },

    setZeroTimeout: (function(global) {
      var timeouts = [];
      var messageName = 'zero-timeout-message';

      // Like setTimeout, but only takes a function argument.	 There's
      // no time argument (always zero) and no arguments (you have to
      // use a closure).
      function setZeroTimeoutPostMessage(fn) {
        timeouts.push(fn);
        global.postMessage(messageName, '*');
      }

      function handleMessage(event) {
        if (event.source == global && event.data == messageName) {
          if (event.stopPropagation) {
            event.stopPropagation();
          }
          if (timeouts.length) {
            timeouts.shift()();
          }
        }
      }
      if (global.addEventListener) {
        global.addEventListener('message', handleMessage, true);
      } else if (global.attachEvent) {
        global.attachEvent('onmessage', handleMessage);
      }
      return setZeroTimeoutPostMessage;
    }(window)),

    // Binary stuff

    // chunks a blob.
    chunk: function(bl) {
      var chunks = [];
      var size = bl.size;
      var start = index = 0;
      var total = Math.ceil(size / util.chunkedMTU);
      while (start < size) {
        var end = Math.min(size, start + util.chunkedMTU);
        var b = bl.slice(start, end);

        var chunk = {
          __peerData: dataCount,
          n: index,
          data: b,
          total: total
        };

        chunks.push(chunk);

        start = end;
        index += 1;
      }
      dataCount += 1;
      return chunks;
    },

    blobToArrayBuffer: function(blob, cb){
      var fr = new FileReader();
      fr.onload = function(evt) {
        cb(evt.target.result);
      };
      fr.readAsArrayBuffer(blob);
    },
    blobToBinaryString: function(blob, cb){
      var fr = new FileReader();
      fr.onload = function(evt) {
        cb(evt.target.result);
      };
      fr.readAsBinaryString(blob);
    },
    binaryStringToArrayBuffer: function(binary) {
      var byteArray = new Uint8Array(binary.length);
      for (var i = 0; i < binary.length; i++) {
        byteArray[i] = binary.charCodeAt(i) & 0xff;
      }
      return byteArray.buffer;
    },
    randomToken: function () {
      return Math.random().toString(36).substr(2);
    },
    //

    isSecure: function() {
      return location.protocol === 'https:';
    }
  };

  module.exports = util;

},{"./adapter":1,"js-binarypack":10}],9:[function(require,module,exports){
  'use strict';

  /**
   * Representation of a single EventEmitter function.
   *
   * @param {Function} fn Event handler to be called.
   * @param {Mixed} context Context for function execution.
   * @param {Boolean} once Only emit once
   * @api private
   */
  function EE(fn, context, once) {
    this.fn = fn;
    this.context = context;
    this.once = once || false;
  }

  /**
   * Minimal EventEmitter interface that is molded against the Node.js
   * EventEmitter interface.
   *
   * @constructor
   * @api public
   */
  function EventEmitter() { /* Nothing to set */ }

  /**
   * Holds the assigned EventEmitters by name.
   *
   * @type {Object}
   * @private
   */
  EventEmitter.prototype._events = undefined;

  /**
   * Return a list of assigned event listeners.
   *
   * @param {String} event The events that should be listed.
   * @returns {Array}
   * @api public
   */
  EventEmitter.prototype.listeners = function listeners(event) {
    if (!this._events || !this._events[event]) return [];

    for (var i = 0, l = this._events[event].length, ee = []; i < l; i++) {
      ee.push(this._events[event][i].fn);
    }

    return ee;
  };

  /**
   * Emit an event to all registered event listeners.
   *
   * @param {String} event The name of the event.
   * @returns {Boolean} Indication if we've emitted an event.
   * @api public
   */
  EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
    if (!this._events || !this._events[event]) return false;

    var listeners = this._events[event]
        , length = listeners.length
        , len = arguments.length
        , ee = listeners[0]
        , args
        , i, j;

    if (1 === length) {
      if (ee.once) this.removeListener(event, ee.fn, true);

      switch (len) {
        case 1: return ee.fn.call(ee.context), true;
        case 2: return ee.fn.call(ee.context, a1), true;
        case 3: return ee.fn.call(ee.context, a1, a2), true;
        case 4: return ee.fn.call(ee.context, a1, a2, a3), true;
        case 5: return ee.fn.call(ee.context, a1, a2, a3, a4), true;
        case 6: return ee.fn.call(ee.context, a1, a2, a3, a4, a5), true;
      }

      for (i = 1, args = new Array(len -1); i < len; i++) {
        args[i - 1] = arguments[i];
      }

      ee.fn.apply(ee.context, args);
    } else {
      for (i = 0; i < length; i++) {
        if (listeners[i].once) this.removeListener(event, listeners[i].fn, true);

        switch (len) {
          case 1: listeners[i].fn.call(listeners[i].context); break;
          case 2: listeners[i].fn.call(listeners[i].context, a1); break;
          case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
          default:
            if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
              args[j - 1] = arguments[j];
            }

            listeners[i].fn.apply(listeners[i].context, args);
        }
      }
    }

    return true;
  };

  /**
   * Register a new EventListener for the given event.
   *
   * @param {String} event Name of the event.
   * @param {Functon} fn Callback function.
   * @param {Mixed} context The context of the function.
   * @api public
   */
  EventEmitter.prototype.on = function on(event, fn, context) {
    if (!this._events) this._events = {};
    if (!this._events[event]) this._events[event] = [];
    this._events[event].push(new EE( fn, context || this ));

    return this;
  };

  /**
   * Add an EventListener that's only called once.
   *
   * @param {String} event Name of the event.
   * @param {Function} fn Callback function.
   * @param {Mixed} context The context of the function.
   * @api public
   */
  EventEmitter.prototype.once = function once(event, fn, context) {
    if (!this._events) this._events = {};
    if (!this._events[event]) this._events[event] = [];
    this._events[event].push(new EE(fn, context || this, true ));

    return this;
  };

  /**
   * Remove event listeners.
   *
   * @param {String} event The event we want to remove.
   * @param {Function} fn The listener that we need to find.
   * @param {Boolean} once Only remove once listeners.
   * @api public
   */
  EventEmitter.prototype.removeListener = function removeListener(event, fn, once) {
    if (!this._events || !this._events[event]) return this;

    var listeners = this._events[event]
        , events = [];

    if (fn) for (var i = 0, length = listeners.length; i < length; i++) {
      if (listeners[i].fn !== fn && listeners[i].once !== once) {
        events.push(listeners[i]);
      }
    }

    //
    // Reset the array, or remove it completely if we have no more listeners.
    //
    if (events.length) this._events[event] = events;
    else this._events[event] = null;

    return this;
  };

  /**
   * Remove all listeners or only the listeners for the specified event.
   *
   * @param {String} event The event want to remove all listeners for.
   * @api public
   */
  EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
    if (!this._events) return this;

    if (event) this._events[event] = null;
    else this._events = {};

    return this;
  };

//
// Alias methods names because people roll like that.
//
  EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
  EventEmitter.prototype.addListener = EventEmitter.prototype.on;

//
// This function doesn't apply anymore.
//
  EventEmitter.prototype.setMaxListeners = function setMaxListeners() {
    return this;
  };

//
// Expose the module.
//
  EventEmitter.EventEmitter = EventEmitter;
  EventEmitter.EventEmitter2 = EventEmitter;
  EventEmitter.EventEmitter3 = EventEmitter;

  if ('object' === typeof module && module.exports) {
    module.exports = EventEmitter;
  }

},{}],10:[function(require,module,exports){
  var BufferBuilder = require('./bufferbuilder').BufferBuilder;
  var binaryFeatures = require('./bufferbuilder').binaryFeatures;

  var BinaryPack = {
    unpack: function(data){
      var unpacker = new Unpacker(data);
      return unpacker.unpack();
    },
    pack: function(data){
      var packer = new Packer();
      packer.pack(data);
      var buffer = packer.getBuffer();
      return buffer;
    }
  };

  module.exports = BinaryPack;

  function Unpacker (data){
    // Data is ArrayBuffer
    this.index = 0;
    this.dataBuffer = data;
    this.dataView = new Uint8Array(this.dataBuffer);
    this.length = this.dataBuffer.byteLength;
  }

  Unpacker.prototype.unpack = function(){
    var type = this.unpack_uint8();
    if (type < 0x80){
      var positive_fixnum = type;
      return positive_fixnum;
    } else if ((type ^ 0xe0) < 0x20){
      var negative_fixnum = (type ^ 0xe0) - 0x20;
      return negative_fixnum;
    }
    var size;
    if ((size = type ^ 0xa0) <= 0x0f){
      return this.unpack_raw(size);
    } else if ((size = type ^ 0xb0) <= 0x0f){
      return this.unpack_string(size);
    } else if ((size = type ^ 0x90) <= 0x0f){
      return this.unpack_array(size);
    } else if ((size = type ^ 0x80) <= 0x0f){
      return this.unpack_map(size);
    }
    switch(type){
      case 0xc0:
        return null;
      case 0xc1:
        return undefined;
      case 0xc2:
        return false;
      case 0xc3:
        return true;
      case 0xca:
        return this.unpack_float();
      case 0xcb:
        return this.unpack_double();
      case 0xcc:
        return this.unpack_uint8();
      case 0xcd:
        return this.unpack_uint16();
      case 0xce:
        return this.unpack_uint32();
      case 0xcf:
        return this.unpack_uint64();
      case 0xd0:
        return this.unpack_int8();
      case 0xd1:
        return this.unpack_int16();
      case 0xd2:
        return this.unpack_int32();
      case 0xd3:
        return this.unpack_int64();
      case 0xd4:
        return undefined;
      case 0xd5:
        return undefined;
      case 0xd6:
        return undefined;
      case 0xd7:
        return undefined;
      case 0xd8:
        size = this.unpack_uint16();
        return this.unpack_string(size);
      case 0xd9:
        size = this.unpack_uint32();
        return this.unpack_string(size);
      case 0xda:
        size = this.unpack_uint16();
        return this.unpack_raw(size);
      case 0xdb:
        size = this.unpack_uint32();
        return this.unpack_raw(size);
      case 0xdc:
        size = this.unpack_uint16();
        return this.unpack_array(size);
      case 0xdd:
        size = this.unpack_uint32();
        return this.unpack_array(size);
      case 0xde:
        size = this.unpack_uint16();
        return this.unpack_map(size);
      case 0xdf:
        size = this.unpack_uint32();
        return this.unpack_map(size);
    }
  }

  Unpacker.prototype.unpack_uint8 = function(){
    var byte = this.dataView[this.index] & 0xff;
    this.index++;
    return byte;
  };

  Unpacker.prototype.unpack_uint16 = function(){
    var bytes = this.read(2);
    var uint16 =
        ((bytes[0] & 0xff) * 256) + (bytes[1] & 0xff);
    this.index += 2;
    return uint16;
  }

  Unpacker.prototype.unpack_uint32 = function(){
    var bytes = this.read(4);
    var uint32 =
        ((bytes[0]  * 256 +
        bytes[1]) * 256 +
        bytes[2]) * 256 +
        bytes[3];
    this.index += 4;
    return uint32;
  }

  Unpacker.prototype.unpack_uint64 = function(){
    var bytes = this.read(8);
    var uint64 =
        ((((((bytes[0]  * 256 +
        bytes[1]) * 256 +
        bytes[2]) * 256 +
        bytes[3]) * 256 +
        bytes[4]) * 256 +
        bytes[5]) * 256 +
        bytes[6]) * 256 +
        bytes[7];
    this.index += 8;
    return uint64;
  }


  Unpacker.prototype.unpack_int8 = function(){
    var uint8 = this.unpack_uint8();
    return (uint8 < 0x80 ) ? uint8 : uint8 - (1 << 8);
  };

  Unpacker.prototype.unpack_int16 = function(){
    var uint16 = this.unpack_uint16();
    return (uint16 < 0x8000 ) ? uint16 : uint16 - (1 << 16);
  }

  Unpacker.prototype.unpack_int32 = function(){
    var uint32 = this.unpack_uint32();
    return (uint32 < Math.pow(2, 31) ) ? uint32 :
    uint32 - Math.pow(2, 32);
  }

  Unpacker.prototype.unpack_int64 = function(){
    var uint64 = this.unpack_uint64();
    return (uint64 < Math.pow(2, 63) ) ? uint64 :
    uint64 - Math.pow(2, 64);
  }

  Unpacker.prototype.unpack_raw = function(size){
    if ( this.length < this.index + size){
      throw new Error('BinaryPackFailure: index is out of range'
      + ' ' + this.index + ' ' + size + ' ' + this.length);
    }
    var buf = this.dataBuffer.slice(this.index, this.index + size);
    this.index += size;

    //buf = util.bufferToString(buf);

    return buf;
  }

  Unpacker.prototype.unpack_string = function(size){
    var bytes = this.read(size);
    var i = 0, str = '', c, code;
    while(i < size){
      c = bytes[i];
      if ( c < 128){
        str += String.fromCharCode(c);
        i++;
      } else if ((c ^ 0xc0) < 32){
        code = ((c ^ 0xc0) << 6) | (bytes[i+1] & 63);
        str += String.fromCharCode(code);
        i += 2;
      } else {
        code = ((c & 15) << 12) | ((bytes[i+1] & 63) << 6) |
        (bytes[i+2] & 63);
        str += String.fromCharCode(code);
        i += 3;
      }
    }
    this.index += size;
    return str;
  }

  Unpacker.prototype.unpack_array = function(size){
    var objects = new Array(size);
    for(var i = 0; i < size ; i++){
      objects[i] = this.unpack();
    }
    return objects;
  }

  Unpacker.prototype.unpack_map = function(size){
    var map = {};
    for(var i = 0; i < size ; i++){
      var key  = this.unpack();
      var value = this.unpack();
      map[key] = value;
    }
    return map;
  }

  Unpacker.prototype.unpack_float = function(){
    var uint32 = this.unpack_uint32();
    var sign = uint32 >> 31;
    var exp  = ((uint32 >> 23) & 0xff) - 127;
    var fraction = ( uint32 & 0x7fffff ) | 0x800000;
    return (sign == 0 ? 1 : -1) *
        fraction * Math.pow(2, exp - 23);
  }

  Unpacker.prototype.unpack_double = function(){
    var h32 = this.unpack_uint32();
    var l32 = this.unpack_uint32();
    var sign = h32 >> 31;
    var exp  = ((h32 >> 20) & 0x7ff) - 1023;
    var hfrac = ( h32 & 0xfffff ) | 0x100000;
    var frac = hfrac * Math.pow(2, exp - 20) +
        l32   * Math.pow(2, exp - 52);
    return (sign == 0 ? 1 : -1) * frac;
  }

  Unpacker.prototype.read = function(length){
    var j = this.index;
    if (j + length <= this.length) {
      return this.dataView.subarray(j, j + length);
    } else {
      throw new Error('BinaryPackFailure: read index out of range');
    }
  }

  function Packer(){
    this.bufferBuilder = new BufferBuilder();
  }

  Packer.prototype.getBuffer = function(){
    return this.bufferBuilder.getBuffer();
  }

  Packer.prototype.pack = function(value){
    var type = typeof(value);
    if (type == 'string'){
      this.pack_string(value);
    } else if (type == 'number'){
      if (Math.floor(value) === value){
        this.pack_integer(value);
      } else{
        this.pack_double(value);
      }
    } else if (type == 'boolean'){
      if (value === true){
        this.bufferBuilder.append(0xc3);
      } else if (value === false){
        this.bufferBuilder.append(0xc2);
      }
    } else if (type == 'undefined'){
      this.bufferBuilder.append(0xc0);
    } else if (type == 'object'){
      if (value === null){
        this.bufferBuilder.append(0xc0);
      } else {
        var constructor = value.constructor;
        if (constructor == Array){
          this.pack_array(value);
        } else if (constructor == Blob || constructor == File) {
          this.pack_bin(value);
        } else if (constructor == ArrayBuffer) {
          if(binaryFeatures.useArrayBufferView) {
            this.pack_bin(new Uint8Array(value));
          } else {
            this.pack_bin(value);
          }
        } else if ('BYTES_PER_ELEMENT' in value){
          if(binaryFeatures.useArrayBufferView) {
            this.pack_bin(new Uint8Array(value.buffer));
          } else {
            this.pack_bin(value.buffer);
          }
        } else if (constructor == Object){
          this.pack_object(value);
        } else if (constructor == Date){
          this.pack_string(value.toString());
        } else if (typeof value.toBinaryPack == 'function'){
          this.bufferBuilder.append(value.toBinaryPack());
        } else {
          throw new Error('Type "' + constructor.toString() + '" not yet supported');
        }
      }
    } else {
      throw new Error('Type "' + type + '" not yet supported');
    }
    this.bufferBuilder.flush();
  }


  Packer.prototype.pack_bin = function(blob){
    var length = blob.length || blob.byteLength || blob.size;
    if (length <= 0x0f){
      this.pack_uint8(0xa0 + length);
    } else if (length <= 0xffff){
      this.bufferBuilder.append(0xda) ;
      this.pack_uint16(length);
    } else if (length <= 0xffffffff){
      this.bufferBuilder.append(0xdb);
      this.pack_uint32(length);
    } else{
      throw new Error('Invalid length');
    }
    this.bufferBuilder.append(blob);
  }

  Packer.prototype.pack_string = function(str){
    var length = utf8Length(str);

    if (length <= 0x0f){
      this.pack_uint8(0xb0 + length);
    } else if (length <= 0xffff){
      this.bufferBuilder.append(0xd8) ;
      this.pack_uint16(length);
    } else if (length <= 0xffffffff){
      this.bufferBuilder.append(0xd9);
      this.pack_uint32(length);
    } else{
      throw new Error('Invalid length');
    }
    this.bufferBuilder.append(str);
  }

  Packer.prototype.pack_array = function(ary){
    var length = ary.length;
    if (length <= 0x0f){
      this.pack_uint8(0x90 + length);
    } else if (length <= 0xffff){
      this.bufferBuilder.append(0xdc)
      this.pack_uint16(length);
    } else if (length <= 0xffffffff){
      this.bufferBuilder.append(0xdd);
      this.pack_uint32(length);
    } else{
      throw new Error('Invalid length');
    }
    for(var i = 0; i < length ; i++){
      this.pack(ary[i]);
    }
  }

  Packer.prototype.pack_integer = function(num){
    if ( -0x20 <= num && num <= 0x7f){
      this.bufferBuilder.append(num & 0xff);
    } else if (0x00 <= num && num <= 0xff){
      this.bufferBuilder.append(0xcc);
      this.pack_uint8(num);
    } else if (-0x80 <= num && num <= 0x7f){
      this.bufferBuilder.append(0xd0);
      this.pack_int8(num);
    } else if ( 0x0000 <= num && num <= 0xffff){
      this.bufferBuilder.append(0xcd);
      this.pack_uint16(num);
    } else if (-0x8000 <= num && num <= 0x7fff){
      this.bufferBuilder.append(0xd1);
      this.pack_int16(num);
    } else if ( 0x00000000 <= num && num <= 0xffffffff){
      this.bufferBuilder.append(0xce);
      this.pack_uint32(num);
    } else if (-0x80000000 <= num && num <= 0x7fffffff){
      this.bufferBuilder.append(0xd2);
      this.pack_int32(num);
    } else if (-0x8000000000000000 <= num && num <= 0x7FFFFFFFFFFFFFFF){
      this.bufferBuilder.append(0xd3);
      this.pack_int64(num);
    } else if (0x0000000000000000 <= num && num <= 0xFFFFFFFFFFFFFFFF){
      this.bufferBuilder.append(0xcf);
      this.pack_uint64(num);
    } else{
      throw new Error('Invalid integer');
    }
  }

  Packer.prototype.pack_double = function(num){
    var sign = 0;
    if (num < 0){
      sign = 1;
      num = -num;
    }
    var exp  = Math.floor(Math.log(num) / Math.LN2);
    var frac0 = num / Math.pow(2, exp) - 1;
    var frac1 = Math.floor(frac0 * Math.pow(2, 52));
    var b32   = Math.pow(2, 32);
    var h32 = (sign << 31) | ((exp+1023) << 20) |
        (frac1 / b32) & 0x0fffff;
    var l32 = frac1 % b32;
    this.bufferBuilder.append(0xcb);
    this.pack_int32(h32);
    this.pack_int32(l32);
  }

  Packer.prototype.pack_object = function(obj){
    var keys = Object.keys(obj);
    var length = keys.length;
    if (length <= 0x0f){
      this.pack_uint8(0x80 + length);
    } else if (length <= 0xffff){
      this.bufferBuilder.append(0xde);
      this.pack_uint16(length);
    } else if (length <= 0xffffffff){
      this.bufferBuilder.append(0xdf);
      this.pack_uint32(length);
    } else{
      throw new Error('Invalid length');
    }
    for(var prop in obj){
      if (obj.hasOwnProperty(prop)){
        this.pack(prop);
        this.pack(obj[prop]);
      }
    }
  }

  Packer.prototype.pack_uint8 = function(num){
    this.bufferBuilder.append(num);
  }

  Packer.prototype.pack_uint16 = function(num){
    this.bufferBuilder.append(num >> 8);
    this.bufferBuilder.append(num & 0xff);
  }

  Packer.prototype.pack_uint32 = function(num){
    var n = num & 0xffffffff;
    this.bufferBuilder.append((n & 0xff000000) >>> 24);
    this.bufferBuilder.append((n & 0x00ff0000) >>> 16);
    this.bufferBuilder.append((n & 0x0000ff00) >>>  8);
    this.bufferBuilder.append((n & 0x000000ff));
  }

  Packer.prototype.pack_uint64 = function(num){
    var high = num / Math.pow(2, 32);
    var low  = num % Math.pow(2, 32);
    this.bufferBuilder.append((high & 0xff000000) >>> 24);
    this.bufferBuilder.append((high & 0x00ff0000) >>> 16);
    this.bufferBuilder.append((high & 0x0000ff00) >>>  8);
    this.bufferBuilder.append((high & 0x000000ff));
    this.bufferBuilder.append((low  & 0xff000000) >>> 24);
    this.bufferBuilder.append((low  & 0x00ff0000) >>> 16);
    this.bufferBuilder.append((low  & 0x0000ff00) >>>  8);
    this.bufferBuilder.append((low  & 0x000000ff));
  }

  Packer.prototype.pack_int8 = function(num){
    this.bufferBuilder.append(num & 0xff);
  }

  Packer.prototype.pack_int16 = function(num){
    this.bufferBuilder.append((num & 0xff00) >> 8);
    this.bufferBuilder.append(num & 0xff);
  }

  Packer.prototype.pack_int32 = function(num){
    this.bufferBuilder.append((num >>> 24) & 0xff);
    this.bufferBuilder.append((num & 0x00ff0000) >>> 16);
    this.bufferBuilder.append((num & 0x0000ff00) >>> 8);
    this.bufferBuilder.append((num & 0x000000ff));
  }

  Packer.prototype.pack_int64 = function(num){
    var high = Math.floor(num / Math.pow(2, 32));
    var low  = num % Math.pow(2, 32);
    this.bufferBuilder.append((high & 0xff000000) >>> 24);
    this.bufferBuilder.append((high & 0x00ff0000) >>> 16);
    this.bufferBuilder.append((high & 0x0000ff00) >>>  8);
    this.bufferBuilder.append((high & 0x000000ff));
    this.bufferBuilder.append((low  & 0xff000000) >>> 24);
    this.bufferBuilder.append((low  & 0x00ff0000) >>> 16);
    this.bufferBuilder.append((low  & 0x0000ff00) >>>  8);
    this.bufferBuilder.append((low  & 0x000000ff));
  }

  function _utf8Replace(m){
    var code = m.charCodeAt(0);

    if(code <= 0x7ff) return '00';
    if(code <= 0xffff) return '000';
    if(code <= 0x1fffff) return '0000';
    if(code <= 0x3ffffff) return '00000';
    return '000000';
  }

  function utf8Length(str){
    if (str.length > 600) {
      // Blob method faster for large strings
      return (new Blob([str])).size;
    } else {
      return str.replace(/[^\u0000-\u007F]/g, _utf8Replace).length;
    }
  }

},{"./bufferbuilder":11}],11:[function(require,module,exports){
  var binaryFeatures = {};
  binaryFeatures.useBlobBuilder = (function(){
    try {
      new Blob([]);
      return false;
    } catch (e) {
      return true;
    }
  })();

  binaryFeatures.useArrayBufferView = !binaryFeatures.useBlobBuilder && (function(){
    try {
      return (new Blob([new Uint8Array([])])).size === 0;
    } catch (e) {
      return true;
    }
  })();

  module.exports.binaryFeatures = binaryFeatures;
  var BlobBuilder = module.exports.BlobBuilder;
  if (typeof window != 'undefined') {
    BlobBuilder = module.exports.BlobBuilder = window.WebKitBlobBuilder ||
    window.MozBlobBuilder || window.MSBlobBuilder || window.BlobBuilder;
  }

  function BufferBuilder(){
    this._pieces = [];
    this._parts = [];
  }

  BufferBuilder.prototype.append = function(data) {
    if(typeof data === 'number') {
      this._pieces.push(data);
    } else {
      this.flush();
      this._parts.push(data);
    }
  };

  BufferBuilder.prototype.flush = function() {
    if (this._pieces.length > 0) {
      var buf = new Uint8Array(this._pieces);
      if(!binaryFeatures.useArrayBufferView) {
        buf = buf.buffer;
      }
      this._parts.push(buf);
      this._pieces = [];
    }
  };

  BufferBuilder.prototype.getBuffer = function() {
    this.flush();
    if(binaryFeatures.useBlobBuilder) {
      var builder = new BlobBuilder();
      for(var i = 0, ii = this._parts.length; i < ii; i++) {
        builder.append(this._parts[i]);
      }
      return builder.getBlob();
    } else {
      return new Blob(this._parts);
    }
  };

  module.exports.BufferBuilder = BufferBuilder;

},{}],12:[function(require,module,exports){
  var util = require('./util');

  /**
   * Reliable transfer for Chrome Canary DataChannel impl.
   * Author: @michellebu
   */
  function Reliable(dc, debug) {
    if (!(this instanceof Reliable)) return new Reliable(dc);
    this._dc = dc;

    util.debug = debug;

    // Messages sent/received so far.
    // id: { ack: n, chunks: [...] }
    this._outgoing = {};
    // id: { ack: ['ack', id, n], chunks: [...] }
    this._incoming = {};
    this._received = {};

    // Window size.
    this._window = 1000;
    // MTU.
    this._mtu = 500;
    // Interval for setInterval. In ms.
    this._interval = 0;

    // Messages sent.
    this._count = 0;

    // Outgoing message queue.
    this._queue = [];

    this._setupDC();
  };

// Send a message reliably.
  Reliable.prototype.send = function(msg) {
    // Determine if chunking is necessary.
    var bl = util.pack(msg);
    if (bl.size < this._mtu) {
      this._handleSend(['no', bl]);
      return;
    }

    this._outgoing[this._count] = {
      ack: 0,
      chunks: this._chunk(bl)
    };

    if (util.debug) {
      this._outgoing[this._count].timer = new Date();
    }

    // Send prelim window.
    this._sendWindowedChunks(this._count);
    this._count += 1;
  };

// Set up interval for processing queue.
  Reliable.prototype._setupInterval = function() {
    // TODO: fail gracefully.

    var self = this;
    this._timeout = setInterval(function() {
      // FIXME: String stuff makes things terribly async.
      var msg = self._queue.shift();
      if (msg._multiple) {
        for (var i = 0, ii = msg.length; i < ii; i += 1) {
          self._intervalSend(msg[i]);
        }
      } else {
        self._intervalSend(msg);
      }
    }, this._interval);
  };

  Reliable.prototype._intervalSend = function(msg) {
    var self = this;
    msg = util.pack(msg);
    util.blobToBinaryString(msg, function(str) {
      self._dc.send(str);
    });
    if (self._queue.length === 0) {
      clearTimeout(self._timeout);
      self._timeout = null;
      //self._processAcks();
    }
  };

// Go through ACKs to send missing pieces.
  Reliable.prototype._processAcks = function() {
    for (var id in this._outgoing) {
      if (this._outgoing.hasOwnProperty(id)) {
        this._sendWindowedChunks(id);
      }
    }
  };

// Handle sending a message.
// FIXME: Don't wait for interval time for all messages...
  Reliable.prototype._handleSend = function(msg) {
    var push = true;
    for (var i = 0, ii = this._queue.length; i < ii; i += 1) {
      var item = this._queue[i];
      if (item === msg) {
        push = false;
      } else if (item._multiple && item.indexOf(msg) !== -1) {
        push = false;
      }
    }
    if (push) {
      this._queue.push(msg);
      if (!this._timeout) {
        this._setupInterval();
      }
    }
  };

// Set up DataChannel handlers.
  Reliable.prototype._setupDC = function() {
    // Handle various message types.
    var self = this;
    this._dc.onmessage = function(e) {
      var msg = e.data;
      var datatype = msg.constructor;
      // FIXME: msg is String until binary is supported.
      // Once that happens, this will have to be smarter.
      if (datatype === String) {
        var ab = util.binaryStringToArrayBuffer(msg);
        msg = util.unpack(ab);
        self._handleMessage(msg);
      }
    };
  };

// Handles an incoming message.
  Reliable.prototype._handleMessage = function(msg) {
    var id = msg[1];
    var idata = this._incoming[id];
    var odata = this._outgoing[id];
    var data;
    switch (msg[0]) {
      // No chunking was done.
      case 'no':
        var message = id;
        if (!!message) {
          this.onmessage(util.unpack(message));
        }
        break;
      // Reached the end of the message.
      case 'end':
        data = idata;

        // In case end comes first.
        this._received[id] = msg[2];

        if (!data) {
          break;
        }

        this._ack(id);
        break;
      case 'ack':
        data = odata;
        if (!!data) {
          var ack = msg[2];
          // Take the larger ACK, for out of order messages.
          data.ack = Math.max(ack, data.ack);

          // Clean up when all chunks are ACKed.
          if (data.ack >= data.chunks.length) {
            util.log('Time: ', new Date() - data.timer);
            delete this._outgoing[id];
          } else {
            this._processAcks();
          }
        }
        // If !data, just ignore.
        break;
      // Received a chunk of data.
      case 'chunk':
        // Create a new entry if none exists.
        data = idata;
        if (!data) {
          var end = this._received[id];
          if (end === true) {
            break;
          }
          data = {
            ack: ['ack', id, 0],
            chunks: []
          };
          this._incoming[id] = data;
        }

        var n = msg[2];
        var chunk = msg[3];
        data.chunks[n] = new Uint8Array(chunk);

        // If we get the chunk we're looking for, ACK for next missing.
        // Otherwise, ACK the same N again.
        if (n === data.ack[2]) {
          this._calculateNextAck(id);
        }
        this._ack(id);
        break;
      default:
        // Shouldn't happen, but would make sense for message to just go
        // through as is.
        this._handleSend(msg);
        break;
    }
  };

// Chunks BL into smaller messages.
  Reliable.prototype._chunk = function(bl) {
    var chunks = [];
    var size = bl.size;
    var start = 0;
    while (start < size) {
      var end = Math.min(size, start + this._mtu);
      var b = bl.slice(start, end);
      var chunk = {
        payload: b
      }
      chunks.push(chunk);
      start = end;
    }
    util.log('Created', chunks.length, 'chunks.');
    return chunks;
  };

// Sends ACK N, expecting Nth blob chunk for message ID.
  Reliable.prototype._ack = function(id) {
    var ack = this._incoming[id].ack;

    // if ack is the end value, then call _complete.
    if (this._received[id] === ack[2]) {
      this._complete(id);
      this._received[id] = true;
    }

    this._handleSend(ack);
  };

// Calculates the next ACK number, given chunks.
  Reliable.prototype._calculateNextAck = function(id) {
    var data = this._incoming[id];
    var chunks = data.chunks;
    for (var i = 0, ii = chunks.length; i < ii; i += 1) {
      // This chunk is missing!!! Better ACK for it.
      if (chunks[i] === undefined) {
        data.ack[2] = i;
        return;
      }
    }
    data.ack[2] = chunks.length;
  };

// Sends the next window of chunks.
  Reliable.prototype._sendWindowedChunks = function(id) {
    util.log('sendWindowedChunks for: ', id);
    var data = this._outgoing[id];
    var ch = data.chunks;
    var chunks = [];
    var limit = Math.min(data.ack + this._window, ch.length);
    for (var i = data.ack; i < limit; i += 1) {
      if (!ch[i].sent || i === data.ack) {
        ch[i].sent = true;
        chunks.push(['chunk', id, i, ch[i].payload]);
      }
    }
    if (data.ack + this._window >= ch.length) {
      chunks.push(['end', id, ch.length])
    }
    chunks._multiple = true;
    this._handleSend(chunks);
  };

// Puts together a message from chunks.
  Reliable.prototype._complete = function(id) {
    util.log('Completed called for', id);
    var self = this;
    var chunks = this._incoming[id].chunks;
    var bl = new Blob(chunks);
    util.blobToArrayBuffer(bl, function(ab) {
      self.onmessage(util.unpack(ab));
    });
    delete this._incoming[id];
  };

// Ups bandwidth limit on SDP. Meant to be called during offer/answer.
  Reliable.higherBandwidthSDP = function(sdp) {
    // AS stands for Application-Specific Maximum.
    // Bandwidth number is in kilobits / sec.
    // See RFC for more info: http://www.ietf.org/rfc/rfc2327.txt

    // Chrome 31+ doesn't want us munging the SDP, so we'll let them have their
    // way.
    var version = navigator.appVersion.match(/Chrome\/(.*?) /);
    if (version) {
      version = parseInt(version[1].split('.').shift());
      if (version < 31) {
        var parts = sdp.split('b=AS:30');
        var replace = 'b=AS:102400'; // 100 Mbps
        if (parts.length > 1) {
          return parts[0] + replace + parts[1];
        }
      }
    }

    return sdp;
  };

// Overwritten, typically.
  Reliable.prototype.onmessage = function(msg) {};

  module.exports.Reliable = Reliable;

},{"./util":13}],13:[function(require,module,exports){
  var BinaryPack = require('js-binarypack');

  var util = {
    debug: false,

    inherits: function(ctor, superCtor) {
      ctor.super_ = superCtor;
      ctor.prototype = Object.create(superCtor.prototype, {
        constructor: {
          value: ctor,
          enumerable: false,
          writable: true,
          configurable: true
        }
      });
    },
    extend: function(dest, source) {
      for(var key in source) {
        if(source.hasOwnProperty(key)) {
          dest[key] = source[key];
        }
      }
      return dest;
    },
    pack: BinaryPack.pack,
    unpack: BinaryPack.unpack,

    log: function () {
      if (util.debug) {
        var copy = [];
        for (var i = 0; i < arguments.length; i++) {
          copy[i] = arguments[i];
        }
        copy.unshift('Reliable: ');
        console.log.apply(console, copy);
      }
    },

    setZeroTimeout: (function(global) {
      var timeouts = [];
      var messageName = 'zero-timeout-message';

      // Like setTimeout, but only takes a function argument.	 There's
      // no time argument (always zero) and no arguments (you have to
      // use a closure).
      function setZeroTimeoutPostMessage(fn) {
        timeouts.push(fn);
        global.postMessage(messageName, '*');
      }

      function handleMessage(event) {
        if (event.source == global && event.data == messageName) {
          if (event.stopPropagation) {
            event.stopPropagation();
          }
          if (timeouts.length) {
            timeouts.shift()();
          }
        }
      }
      if (global.addEventListener) {
        global.addEventListener('message', handleMessage, true);
      } else if (global.attachEvent) {
        global.attachEvent('onmessage', handleMessage);
      }
      return setZeroTimeoutPostMessage;
    }(this)),

    blobToArrayBuffer: function(blob, cb){
      var fr = new FileReader();
      fr.onload = function(evt) {
        cb(evt.target.result);
      };
      fr.readAsArrayBuffer(blob);
    },
    blobToBinaryString: function(blob, cb){
      var fr = new FileReader();
      fr.onload = function(evt) {
        cb(evt.target.result);
      };
      fr.readAsBinaryString(blob);
    },
    binaryStringToArrayBuffer: function(binary) {
      var byteArray = new Uint8Array(binary.length);
      for (var i = 0; i < binary.length; i++) {
        byteArray[i] = binary.charCodeAt(i) & 0xff;
      }
      return byteArray.buffer;
    },
    randomToken: function () {
      return Math.random().toString(36).substr(2);
    }
  };

  module.exports = util;

},{"js-binarypack":10}]},{},[3]);